Create a custom dialog with radio buttons list

Question

I've got a method in which i have a list of values:

     /**      * ISO      * */     public void getISO(View view) {         // Open dialog with radio buttons         List<String> supported_isos = preview.getSupportedISOs();         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(MainActivity.this);         String current_iso = sharedPreferences.getString(MainActivity.getISOPreferenceKey(), "auto");      } 

This method is enjected on onClick() of a ImageButton:

android:onClick="getISO" 

But i need to rapresent this list in a dialog with radio buttons. Possibly the preference values should be already selected in the dialog.. Is it possible?

Answer 1

best and easy way......

void dialog(){          AlertDialog.Builder alt_bld = new AlertDialog.Builder(this);         //alt_bld.setIcon(R.drawable.icon);         alt_bld.setTitle("Select a Group Name");         alt_bld.setSingleChoiceItems(grpname, -1, new DialogInterface                 .OnClickListener() {             public void onClick(DialogInterface dialog, int item) {                 Toast.makeText(getApplicationContext(),                         "Group Name = "+grpname[item], Toast.LENGTH_SHORT).show();                 dialog.dismiss();// dismiss the alertbox after chose option              }         });         AlertDialog alert = alt_bld.create();         alert.show();   ///// grpname is a array where data is stored...        } 

Answer 2

Call showRadioButtonDialog() from the button.

This is just an example:

private void showRadioButtonDialog() {   // custom dialog    final Dialog dialog = new Dialog(this);   dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);   dialog.setContentView(R.layout.dialog_layout);   List<String> stringList=new ArrayList<>();  // here is list       for(int i=0;i<2;i++) {           if (i==0){               stringList.add("Number Mode");           }else {               stringList.add("Character Mode");           }        }        RadioGroup rg = (RadioGroup) dialog.findViewById(R.id.radioGroup);        for(int i=0;i<stringList.size();i++){             RadioButton rb=new RadioButton(this); // dynamically creating RadioButton and adding to RadioGroup.             rb.setText(stringList.get(i));             rg.addView(rb);       } } 

Your layout view might be:radiobutton_dialog.xml

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">       <RadioGroup           android:id="@+id/radio_group"           android:layout_width="wrap_content"           android:layout_height="match_parent"           android:layout_gravity="center_vertical"           android:orientation="vertical">     </RadioGroup>  </LinearLayout> 

Note: you can customize your dialog view (like setting title, message etc.)

Edit: To retrieving value of the selected RadioButton you have to implement setOnCheckedChangeListener listener for your RadioGroup as :

 rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {              @Override             public void onCheckedChanged(RadioGroup group, int checkedId) {                  int childCount = group.getChildCount();                  for (int x = 0; x < childCount; x++) {                     RadioButton btn = (RadioButton) group.getChildAt(x);                     if (btn.getId() == checkedId) {                          Log.e("selected RadioButton->",btn.getText().toString());                      }                  }             }         });